Grinder



May 5, 1942. I H. H. TALBOYS 5 GRINDER Filed aq- 1941 2 Sheets-Sheet l T nit" I 5;}: 32

I I I Im/zniofi an albp s Patented May 5, 1942 GRINDER Henry H. Talboys, Milwaukee, Wis., assignor to Nordberg Manufacturing Company, Milwaukee, Wis.

Application January'i), 1941,Serial No. 373,757

4 Claims.

This invention relates to grinders and more particularly to a grinding wheel mounting.

In grinding wheels it is the common practice to cast nuts in the wheel, and fasten the wheel to a face plate with bolts which pass through the plate and engage the nuts. While this practice is satisfactory from the standpoint of holding the wheel, it is a slow laborious process to change abrasive wheels. Since it is necessary to change wheels frequently in order to allow for differences in materials being ground it is highly desirable to be able to make such changes rapidly.

One object of the present invention is to provide a readily detachable grinding wheel mounting which will hold the abrasive wheel firmly during grinding.

Another object is to provide a peripheral mounting for grinding wheels which will permit variations or irregularities in the periphery of the wheel.

A further object is to provide a grinding wheel mounting which will enable the abrasive wheel to be changed more readily.

Other objects will become apparent upon considering the following specification which, when taken in connection with the accompanying drawings, illustrates one form of the invention.

In its broadest aspect the invention comprises in combination with a cylindrical abrasive wheel having a peripheral shoulder and fiat parallel ends, a grinding wheel mounting including a face plate adapted to support one of said flat ends of the abrasive wheel and means carried by the plate and engageable with the peripheral shoulder of the abrasive wheel to clamp the wheel to the plate.

In the drawings:

Fig. 1 is a transverse cross-sectional View of a grinding wheel assembly as used on track grinders, illustrating the present invention;

Fig. 2 is an elevational view, partly in crosssection, of an abrasive wheel embodying the present invention;

Fig. 3 is a top plan View of the face plate;

Fig. 4 is a cross-section on the line 4-4 of Fig. 3, looking in the direction of the arrows;

Fig. 5 is a top plan view of the clamping ring; and

Fig. 6 is an elevational View partly in crosssection (taken on the line 66 of Fig. 5).

Referring to the drawings, in which like numerals indicate like parts throughout the several views, the grinder is carried from a housing 10 and is driven from a power source (not shown) through a plurality of V-belts II or equivalent means. The V-belts I I operate in V-shives I2 mounted on a shaft I3. The shaft l3 turns a bevel gear 15 mounted on the shaft, which gear meshes with bevel gears l6 mounted on a vertical shaft H.

The shaft I! may be jcurnaled in the housing I!) between bearings l9 and 20 one of which is a thrust bearing to absorb axial forces.

The shaft I! may have an enlarged end 2! thereon to which a face plate 23 is fastened by means of bolts 2525.

A grinding or abrasive wheel 28 abuts the face plate 23 and is held in position thereon and in contact therewith by a plurality of inwardly projecting spring fingers 28 formed on an internally threaded annulus 29 which screws on to a threaded rim 30 of the face plate 23, the fingers 28 engaging an outwardly sloping shoulder 32 of the abrasive Wheel 26 to both center the wheel and hold it securely on the face plate 23.

In practice, the annulus 29 is made of resilient material, preferably steel, with an inwardly projecting skirt. A plurality of axial slots are cut through the skirt to form it into the plurality of spring fingers 28, as shown.

The threads on the annulus 29 and the rim 30 are so arranged that normal rotation of the abrasive wheel tends to tighten the wheel onto the face plate 23.

Since the spring fingers 28 act individually they automatically compensate for any variation or irregularity in the shoulder 32 and give even holding pressure throughout the circumference of the wheel.

In order to insure ready removal of the annulus 29, apertures 35 are provided about its periphery, in which may be inserted a wrench or other tool to loosen the threads.

The above construction affords an abrasive wheel which is simple in construction, is easily attached to and detached from the face plate thus giving a grinder in which the abrasive wheel may be changed at will.

It is realized that the above construction is subject to various changes and modifications falling within the scope of the claims. It is not therefore, desired to limit the invention to the precise form herein shown and/or described, but only by the scope of the appended claims.

That which is claimed as new and desired to secure by Letters Patent is:

1. A grinder of the character described comprising, a face plate, an annular abrasive wheel having parallel ends, one of said ends abutting said face plate, an outwardly sloping peripheral shoulder on said abrasive wheel adjacent said face plate, and a plurality of fingers engaging the periphery of said shoulder and attached to said face plate to secure the abrasive wheel thereon.

2. A grinder of the character described comprising, a face plate, an annular abrasive wheel having parallel ends, one of said ends abutting said face plate, an outwardly sloping peripheral shoulder on said abrasive wheel adjacent said face plate, a ring having a threaded connection with the periphery of said face plate, and means on said ring engaging the shoulder on said wheel to maintain the Wheel in engagement with the face plate.

3. A grinder of the character described comprising, a face plate, an annular abrasive wheel having parallel ends, one of said ends abutting said face plate, an outwardly sloping peripheral shoulder on said abrasive wheel adjacent said face plate, a ring having a threaded connection with the periphery of said face plate, and a plurality of fingers mounted on said ring and projecting inwardly to engage the shoulder on the abrasive wheel to maintain the wheel in engagement with the face plate.

4. A grinder of the character described comprising, a face plate, an annular abrasive wheel having parallel ends, one of said ends abutting said face plate, an outwardly sloping peripheral shoulder on said abrasive wheel adjacent said face plate, an annular ring of resilient material, an inwardly extending depending annular skirt on said ring, said skirt having a plurality of slots cut axially therethrough to form the skirt into a plurality of spring fingers, and means on said ring engaging said face plate to secure the ring to the face plate with the spring fingers engaging said shoulder to secure the wheel onto the face plate.

HENRY H. TALBOYS. 

